Tack-fastened button



May 23, 1967 D. J. DADDONA, JR

TACK-FASTENED BUTTON Filed Apr-11 9, 1965 fifi! United States Patent Otitice 3,320,644 Patented May 23, 1967 3,320,644 TACK-FASTENED BUTTON Domenic J. Daddona, Jr., Waterbury, Conn., assignor to Scovill Manufacturing Company, Waterbury, Conn., a corporation of Connecticut Filed Apr. 9, 1965, Ser. No. 446,824 2 Claims. (Cl. 24-95) This invention is an improvement in tack-fastened buttons, or what is more com-monly called tack butt-ons.

Most ybuttons of this characte-r employ a face structure which usually includes a ller to provide an anvil surface for clinching the tack, a hollow sheet metal back and hub piece and a separate tack anchor mounted inside the hub to provide `a seat for the upset end of the tack. The extra cost involved in the separate anchor and in assembling it in the hub has long been sought to be overcome by making a tack anchoring device integral with the hub. One early example of this is indicated in the King Patent 1,127,637. However, it as well as other attempts in the meantime, have so far proven commercially unsuccessful. The structure of the King patent, for example, was easily pulled apart because the upset horn of the tack would rip away the tack anchor.

An object of my invention, therefore, is to provide an improved construction where the tack anchor is formed in one piece with the hub and button back while at the same time, a very durable and strong seat is provided for the upset head of the tack. With the improved construction, the strength against pull-off is increased even over that of the separate anchor construction which has been in common use for many years. In this invention, as in the aforementioned King patent, the bottom of the hub is introverted, but instead of piercing through the top or end wall of this introverted portion in an upward direction, the cylindrical wall is ared adjacent the upper end and the end wall is pierced .downwardly so that the jagged edges point downwardly or away from the upset end of the tack.

In the accompanying drawing, I have shown one ernbodiment which my invention may assume in practice. In the drawing:

FIG. 1 is a vertical section of my improved tack button preparatory to assembly;

FIG. 2 is a similar cross-section fully assembled; and

IFIG. 3 is a vertical section indicating one of the steps in the manufacture.

The face structure of the button may have a thin decorative shell 6 clamped over the button back 7 by interengaging anges 8 and 9, respectively. A ller disc 10 is interposed between the shell 6 and back 7 because normally the shell 6 is not strong or hard enough to withstand the force of upsetting the tack. The disc 10 provides a downwardly facing anvil surface 11 of hard material suitable for upsetting the tack point. T hetack, incidentally in FIG. 1, is shown as having a head 12, a shank 13 and a pointed end 14. A hollow hub 15 extends downwardly in central position from the button back 7 and has a bottom 16 adapted to bear against the cloth or other article, herein indicated by the numeral 17.

Referring now to FIG. 3, an introverted portion is formed from metal drawn into and upwardly from the bottom 16 to provide a cylindrical wall 18 of a size adapted to confine the shank 13 of the tack. Around the top of this cylindrical wall is an outwardly ared portion 19 and the downwardly depressed top wall 20. At this stage, a piercing tool 21 is used to break through the top wall to provide a jagged hole with burrs 22. The punch 21 is moved far enough to draw these jagged edge portions or burrs 22 down into the hole so as to lie against the ared poriton 19. In this process, the metal is not only doubled up around the ared end of the tack anchor, but is strengthened by work-hardening. Now when the button is fastened to the cloth 17 by the tack, the point of the tack will form an upset head 23 seated rmly in the doubled-up flared end of the tack anchor. This provides a relatively thick seat with smooth rounded surfaces which leaves nothing which is likely to be torn by any sharp edge or horn of the upset head.

I have thus provided an anchor tack button with a minimum number of parts which resists failure by reason of direct pull-olf or tilting action to a degree which surpasses other known buttons.

What I claim is:

1. A tack button having a face structure providing a downwardly facing anvil surface for upsetting a tack point, a back to which said face structure is secured, a hub having Ian introverted bottom extending up into the hub a substantial distance to provide a tack anchor integral with said hub and back, said tack anchor having a cylindrical portion adapted to confine the tack shank and an outwardly flared portion around the top of said cylindrical portion, said introverted bottom having a hole through its upper end, the material around the edges of said hole being folded inwardly and downwardly to lie against said outwardly flared portion to provide a seat for the upset end of the tack.

2. A tack button comprising a back, a disc in front of the back to provide an anvil surface for upseting a tack point, Ia front shell overlying said disc and attached to said back, a hub extending downwardly from the back end having an introverted bottom providing a cylindrical portion extending upwardly for a -ma-jor portion of the length of said hub, an outwardly flared portion around the top of said cylindrical portion, the top of said introverted portion having a jagged hole punched downwardly therethrough to provide jagged edge portions or burrs which are folded over against said -ared portion to provide a relatively thick and smooth surfaced seat for the upset end of a tack.

References Cited by the Examiner UNITED STATES PATENTS 474,150 5/ 1892 Shorey 24-95 1,127,637 2/1915 King 24-95 1,601,933 10/1926 Warner 24-95 FOREIGN PATENTS 1,021,783 12/1952 France.

WILLIAM FELDMAN, Primary Examiner.

D. GRIFFIN, Examiner, 

1. A TACK BUTTON HAVING A FACE STRUCTURE PROVIDING A DOWNWARDLY FACING ANVIL SURFACE FOR UPSETTING A TACK POINT, A BACK TO WHICH SAID FACE STRUCTURE IS SECURED, A HUB HAVING AN INTROVERTED BOTTOM EXTENDING UP INTO THE HUB A SUBSTANTIAL DISTANCE TO PROVIDE A TACK ANCHOR INTEGRAL WITH SAID HUB AND BACK, SAID TACK ANCHOR HAVING A CYLINDRICAL PORTION ADAPTED TO CONFINE THE TACK SHANK AND AN OUTWARDLY FLARED PORTION AROUND THE TOP OF SAID CYLINDRICAL PORTION, SAID INTROVERTED BOTTOM HAVING A HOLE THROUGH ITS UPPER END, THE MATERIAL AROUND THE EDGES OF SAID HOLE BEING FOLDED INWARDLY AND DOWNWARDLY TO LIE AGAINST SAID 